Heater for engine water circulating systems



(3. F. WALZ HEATER FOR ENGINE WATER CIRCULATING SYSTEMS April 23, 1929.

Filed July 2, 1928 Pia, i

Inventor CARL F. WALZ B M WWW Attorneys Patented Apr. 23, 1929 UNITEDSTA" FFICE,

CARL F. WALZ, F MINNEAPOLIS, MINNESOTA, ASSEGNOR TO DURKEE-ATWOQD GOM-PANY, 0F MINNEAPOLIS, MINNESOTA, A CQRPQRATION 0F MINNESOTA.

HEATER FQR ENGINE WATER CIRCULATKN'G SYSTEMS Application filed July 2,was. Serial lilo. 839,794.

This invention relates to improvements in heaters for water circulatingsystems of 111- ternal combustion engines, whereby the cooli ing mediummay be kept Warm in cold weather, when the engine is not running, andalso whereby the circulating cooling medium of the engine may be heatedto warm the en gine before initially starting the latter, therebyfacilitating engine starting.

An object of the invention is to provide a heater for engine Watercirculating systems adapted to be connected in a pipe of the circulatingsystem and having means for laterally adjusting it with respect to thepipe, in 16 which it is connected, to facilitate the installation of thedevice on the engine.

A further object of the invention is to provide a heater for enginewater circulating systems, comprising a tubular supporting member havinga suitableheating means mounted therein and adapted for attachment withan electric light socket, or other source of electrical energy, and thesupporting member having eccentric means being provided at each endthereof, permitting lateral adjustment thereof with respect to the watercirculating pipe in which it is connected, so that the axis of theheater supporting member may be off-set from the axis of the pipewithout interfering with the operation of the heater, such adjustment ofthe heater being necessary when installed in some circulating systemsbecause of the lack of room or clear ance between the water circulatingpipe and the engine block.

A further and more specific object of the invention is to provide anelectric heater for engine water circulating systems, comprising atubular flexible supporting member having an eccentric bushing insertedin each end thereof, each provided with an aperture adapted to receivean end of the water circulating pipe in which the heater is mounted, anda suitable clamping means being provided at each end of the supportingmember for securing the heater in adjusted positions upon the pipe, andto contract the parts to prevent leakagebetween the joints thereof.

Other objects of the invention will appear from the followingdescription and accompanying drawings and will be pointed out in theannexed claims.

In the accompanyingdrawings, there has been disclosed a structuredesigned to carry put the various objects of the invention, but 1t is tobe understood that the invention is not confined to the exact featuresshown as various changes may be made within the scope of the claimswhich follow.

In the accompanying drawings forming part of this specification F gure 1is a view illustrating a portion of an internal combustion engine withthe invention applied thereto;

Figure 2 is an enlarged longitudinal sectional view of the improvedheater, showing the means provided at each end thereof for laterallyadjusting it; v

Flgure 3 is a perspective view illustrating one of the eccentricbushings removed from the device;

Figure 4c is an end elevation, showing the device mounted in awater-circulating pipe,

and the heater laterally adjusted with respect to the pipe because oflack of clearance between the pipe and the engine block.

in the selected embodiment of the invention here shown, for purposes ofdisclosure, there is illustrated in Figure 1, a portion of an lnternalcombustion engine comprising the usual cylinder block 2, crank case 3,cooling rad1ator 4 having a pipe connection 5 connected with the lowerportion thereof, and a pipe 6, connected to the cylinder block as shown1n Figure 1.- The pipes 5 and 6 are usually connected together by meansof a flexible hose connection to permit a slight movement of one pipewith respect to the other, caused usually by engine vibration. This iscommon practice in most automobile engines, because the radiator is notsupported directly upon the engine, but upon the vehicle phassis, andthe flexible connection usually interposed between the pipes 5 and 6,permits limited relative movement between the pipes, caused by enginevibration.-

The novel heater featured in this invention is adapted to be interposedbetween the pipes 5 and 6 in place of the usual hose connection, abovereferred to.

lhe invention comprises a tubular support ing member 7, preferably offlexible material, such as rubber hose, and has a suitable heatingelement 8 mounted therein and supported in a wall of the member 7, asshown in Figure 2. fhe heating element comprises a cylindrical casing 9having a relatively smaller member 11 mounted therein which is providedwith outwardly flared end portions 12, adapted to be fitted into theends of the cylindrical easing 9 and secured thereto by such means assoldering or electric welding. The wall of the relatively smaller member11 is spaced from the wall of the casing 9, to provide an annular spaceadapted to receive-the heating element 8. A threaded nipple 13 issuitably secured to the wall of the casing 9 and is adapted to beinserted through an aperture 14, provided in the wall of the support-ing member 7. Washers 15. are mounted on the nip le 13 and are placedrespectively inside an outside of the wall of the member 7. The outerwasher is en aged by a clamping nut 16 received in threaded engagementwith the nipple 13, and which also forms a finishing cap for the nipple13 as shown in Fi ure 2. The mpple is provided with a bore 17 a apted toreceive the cable conductor 18 which has one end connected with theheating element 8,

and has its other end connected with a plug 19 adapted for connectionwith an electri light socket. I

An important feature of this invention resides in the novel meansrovided for laterally adjusting the supporting member 7 with respect tothe circulating pipes 5 and 6 of the engine cooling system. The meansfor thus ad usting the heater is best shown in Figure 2, and comprises apair of eccentric bushings 21, one mounted at each endof the su portingmember 7. Each bushing is provide with an aperture adapted to snuglyreceive the end of its complementary water pipe. A suitable hose clamp22 is provided at each end of the su porting member 7 and provides meansfor 'in the water-circulating tig tlylclamping the parts against thepe-- ripheries of the pipes 5 and 6 to secure the heater in properposition thereon, and also to.

prevent leakage of the cooling medium between the pi es and the heater.

Figure 4 il in the water circulating pipes 5 and 6 are arrangedrelatively close to the crank case 3 of the en ine, When mounting theheater in the circu ating system of an engine having the pipes 5 and 6thus arranged, the axisof the heater or tubular member is oil-set fromthe axis of the ipes 5 and 6, as shown in Figure 4, to provi e clearancefor the supporting member 7 between the water circulating pipes and theengine crank case or block. It will therefore be seen that by means ofthe novel adjusting means provided at each end of the supporting member7 of the heater, that the latter may be relatively adjusted with respectto the pipes 5 and 6 to facilitate installation system of the engine,and also whereby the eater may be conveniently fitted between theadjacent ends of the two pipes 5 and 6, regardless of whether they arein exact axial a-llnement or not.

lustrates an installation where-- The-eccentric bushings 21 arepreferably of flexible material such as rubber, and are snugly fittedinto the ends of the tubular supporting member 7. Thus, when the deviceis connected in the circulating pipes, as shown in Figure 2, and thehose clamps are tightened, the parts encircled thereby will becontracted against the peripheries of the pipes 5 and 6, which usuallyare of metal, thereby securing the heater in the circulating system,and, at the same time, providing means for readily removing the heatertherefrom durin the summer months, if desired. Thedevice is,

very simple and inexpensive and may be mounted in any standard type ofwater eirculating system in a comparatively short length of time.

1 claim as my invention:

1. A heater for engine water circulating systems, including a supportingmember adapted to be interposed in a pipe of the circulating system andhaving means therein for heating the water, and means for laterallyadjusting the heater with respect to said pipe- 2. A heater for enginewater circulating systems, including a supporting member adapted to beconnected in a pi e of the circulating system, means in sai supportingmember for heating the water, and eccentric means for laterallyadjustin'gthe sup-' porting member with respect to said pipe.

3. A heater for engine water circulating systems, comprising asupporting member adapted to be connected in a pipe of the circulatingsystem, heating means in said supporting member, and eccentric means ateach end of the member for laterally adjusting it with respect to saidpipe.

4. A heater for engine water circulating systems, com rising a flexibletubular supporting mem er, a heating unit mounted therein and havingmeans for connection with a source of electrical energy, and ancecentric bushing inserted in each end of .the supporting member andeach adapted to be connected with a pipe of the circulating system, saideccentrics providing means for laterally adjusting the heater withrespect to said pipe.

5. A heater for engine water circulating systems, comprising a flexibletubular supporting member,'a heating unit mounted therein and havingmeans for connection with a source of electrical ener y, an eccentricbushing inserted in each en of the supporting member and each adapted tobe connected with a pipe of the circulating system, said with saidjacket and radiator, of a water heatbushings to provide leak-proofjoints beer and circulator, comprising a tubular memtween the bushingsand pipes, said bushings ber adapted to connect together said pipes,being interchangeable whereby the heater 10 said tubular member havingflexible bushings may be fitted to pipes of different diameters. 5detachably mounted therein provided with In Witness whereof, I havehereunto set my apertures adapted to receive the terminals of hand this28th day of June, 1928. said pipes, and means for contracting said CARLF. WALZ.

